uart_unlock_and_check_sysrq 491 include/linux/serial_core.h uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags) uart_unlock_and_check_sysrq 509 include/linux/serial_core.h uart_unlock_and_check_sysrq(struct uart_port *port, unsigned long irqflags)